Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh ban » doanh bat, doanh van, doanh nhan
ban muon » ban huong, ban tuong, ban quan
muon tre » muong tren, tuoi tre, muong te
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
bao va » bao ve, tao va, cao va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac ((bao va) OR (ban va)) doanh ban muon tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thu san)) ky nang x hoi. hieu va cac ((bao va) OR (ban va)) doanh ban muon tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac ((bao va) OR (ban va)) doanh ban muon tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thu san)) ky nang x hoi. hieu va cac ((bao va) OR (ban va)) doanh ban muon tre*.